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(No Mndel.) u 5 Sheets-Sheet 1.

' E. E. CARTER.

MINING MACHINE.

N. PETERS, Phnm-Limngnpher, washington. D C

(No Model.) 5 sheets-sheen 2..

E. E. CARTER.

MINING, MACHINE.

110. 393,313. I Patented Feb. 19, 1333..

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uml 8. (0a ML( 1 WN-@M315 (No Modem.' 5 sheets-sheen s.

' E. E. CARTER.

MINING MACHINE.

No. 398.313, Patentedleb. 19, 1889.

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(No Model.) 5 Sheets-Sheet 4. E. E. CARTER. MINNG- MACHINE.

N0..398,313. Patented Feb. 19,1889.

5 Sheets-Sheet 5.

(No Model.)

E. E. CARTER. MINING MAG'HINB.

Pateutedeb. 19. 1889.

FIGJI. 4

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lImTED STATES PATENT OEEICE.

ED\VIN E. CARTER, OF PI'lTSl-URG, PENNSYLVANIA, ASSIGNOR TO .IOIINIULIJY, OE SAME PLACE. l

MINING-MACHINE SPECIFICATION forming part of Letters Patent No. 398,313,dated February 19, 1889.

Application filed October 26", 1888u Serial No. 289,200. (No model.)

To all whom, it may concern.- the feed mechanism. Figs. 8 and i) aresecl-citknown thatI, EDWIN E. CARTER, a cititional views, the planes ofsection being at '/.en ot' the United States, residing at Pitts rightangles to each other, of the gearing for burg, in the county ofAllegheny and State of transmitting motion to the shaft for drivingPennsylvania, have invented or discovered the feed mechanism. Figs. 10and 11 are sec- 55 certain new and useful Improvements in Mintionalviews, the planes of section being at ing-llachines, of whichimprovements the folright angles to each other, of the feed-can lowingis a specification. riage and its operating mechanism. Figs. 12,

The invention described herein relates to 13, and 14 are detail views ofthe drill bars ro certain improvements in that class or kind ofv orspindles, Figs. 13 and 14 being transverse 6o miningmachines wherein areemployed a sesections on the lines t t and u o, Fig. 12. ries ofrotating cutters operating in substan In the practice of my invention Iprovide tially the same horizontal plane, said cutters a rectangularframe consisting ot the end being movable back and forth through theirpieces, 1 and 2, and the side pieces, 3, all of 15 driving mechanism forthe purpose of undersaid parts being firmly secured together. The 65cutting the coal. side pieces are formed of channel-bars ar- Theinvention has for its object such a conranged with their flanges 4projecting instruction of machine of the class indicated as wardly,thereby forming guides and supports will permit of the formation of alow narrow for the spindle cross-head or carrier, as hereunder-cut andot the arrangement oi' the inafter more fully described. 70 steadying orguide bar for thc cutters in close The cylinders 5 are secured to orformed In'oximity to the coal-breast, the clearing or integral with theframes 6,arranged longitudicleaning mechanism being' so constructed asnallyot' the main frame and secured thereon to follow the cutters intheir inward moveby the side bracket-s or legs, 7, extending to 2 5mont, and that its effectiveness .in clearing the side pieces, and theend brackets, 8, pref- 75 the under-cut of dust, the., increases inproerably formed integral with the head-piece 2 portion to the depth ol'penetration of the cutot' the frame, the rear ends of the frames o ters;and further, the invention has forits obbeing held in proper relation toeach other ject snchadditional improvementsin the conby the crossbrace9. The piston-rods 10 of 3o struction and arrangement of the operatingsaid cylinders are connected by craiik-pins 1l 8o mechanism as willrender thc same more efto disks 12 on opposite ends of the shaft 13,

fective and economical in operation. which is mounted in suitablebearings formed In general terms the invention consists in in the frames6. the construction and combination ot mechan- On the shaft 13 are keyedthe gear-\ vl1eels 3 5 ical devices or elements, all as more ii'ully1+i, intermeshing with corresponding gears,15, 85 hereinafter describedand claimed. on. what might be termed the power-distrib- In theaccompanying drawings, forming uting shaft7 16, said shaft being mountedin a part of this specification, Figure 1 is a suitable bearings, 17, onthe brackets 1S, plan view of my improved mining-machine. formed on orsecured to the rear side of the 40 Fig. 2 is a view in side elevation ofthe box, forming the front piece, 2, of the main 9o same, showing themachine in operative poframe, as shown in Figs. 1 and 5. sit-ion in amine. Fig. 3 is a view showing On the shaft 16 are keyed a series ol'bevthe front end of the machine in elevation. eled gearavheels, 19,which intermesh with Fig. 4 .is a view partly in section and partlycorresponding beveled gears, 20, journaled on in elevation, the sectionbeing taken on short counter-shafts 2l, mounted in bearings 95 the linea: o3, Fig. A5. Fig. 5 is a longitudion the upper ends of the brackets18, and nal section on the line y y, Fig. 1. Fig. 6 is arms 22, formedon the front side of the box a sectional view of one form of the spine2, forming the front of the main frame. Pindledriving gears. Fig. 7 is asectional detail ions 23 are formed integral with the beveled 5o of aportion of the mechanism for reversing gears 2O and are adapted tointermesh with Too gear-wheels 24, journaled on short countershafts 25,mounted in suitable bearings in the front and rear sides of the box 2.These gear-wheels 24 also have pinions 25:L formed integral with them,each of the pinions 25*l being arranged to intermesh with twogearwheels, 26, mounted on the drill bars or spindles 27, which arepreferably angular in crosssection and pass through acorrespondinglyshaped opening in the gear-wheels 26, as shown in Fig. 4,although the gear-wheels and spindles may be connected together by a keyand spline, whereby said spindles are caused to rotate with thegear-wheels. On the outer or front ends of the spindles or bars 27 aresecured suitable cutters, 28, preferably of the construction describedand claimed in Letters Patent No. 387,144, granted to me July 31, 1888.

In order to permit of the cutters being arranged in close proximity toeach other, and at the same time to permit of the use of comparativelylarge gear-wheels for rotating the spindles and cutters withoutincreasing ,the size of said cutters, the gear-wheels 26 are arranged indifferent vertical planes, the adjacentv gear-wheels overlapping eachother, as shown in Figs. 4 and 5. The spindles or bars 27 are supportednear their front ends in suitable bearings formed in the front and rearsides of the box 2, and when spindles or bars having an angularcross-section are employed I provide sleeves 29, round in crosssectionand having angular openings for the reception of the shafts 27, saidsleeves being arranged in the bearings in the front and rear sides ofthe box 2.

Inorder to lessen the friction due to the longitudinal movement of theangular spindles or bars 27 through the driving-gears 26 vdurin g thecutting operation, the walls of the angular openings through saidgear-wheels are formed by friction-rollers 30, arranged in suitablerecesses, as shown in Fig. 6. The friction-rollers 30 are held inposition by pins 81, inserted through holes through the disk 32, formingthe body portion of the gear-wheel 26 prior to shrinking the toothedring 33, forming the outer portion of such gear-wheel, upon the disk 32.

The spindles or bars 27 are made of a length proportional to the depthofv cut desired, and at their rear ends are connected to the crossheador carriage 34, as shown in Figs. 5 and 10, in such manner as to causethe spindles to move with the cross-head, but permitting of their freerotation. This cross-head or carriage extends across the main frame, andis provided at its ends with wheels 35, resting upon the lower flange ofthe side pieces, 3, and with wheels 36, bearing against the inner wallsof the side pieces, said wheels serving to facilitate the movements ofthe cross-head. To the under side of the flanges of the side pieces, 3,are secured racks 37,with which pinions 38 engage, said pinions beingkeyed to or formed integral with shafts S9, which are mounted inbearings 40 on the cross-head or carriage. On the same shafts with thepinions 38 are secured gear-wheels 41, arranged to intermesh withpinions 42 on shafts 43, which are mounted -in bearings 44, and areprovided with gear-wheels 45, intermeshing with pinions 46v on the Aendsof the shaft 47, extending longitudinally of the cross-head or carriageand serving to transmit equal and simultaneous movements to the abovedescribed mechanisms at each end of the cross head or carriage, as shownin Fig. 1. On the shaft 47, about midway of its length,is keyed agearwheel, 48, with which a pinion, 49, formed integral or moving withthe beveled gearwheel 50, intermeshes, said beveled gear 50 and pinion49 being mounted on a pin, 51, suitably supported by brackets 52 and 53,extending up from the cross-head or carriage, as shown in Fig. 8. Thebeveled gear 50 intermeshes with a correspondingly shaped gear-wheel,54, arranged on a shaft, 55, mounted in suitablebearings, 56, formed onthe front and rear end pieces of the main frame, as shown in Figs. 1 and5. The beveled gear 54 is so connected by a spline and groove with theshaft 55 as to rotate therewith and to move therealong with thecross-head or carriage, with which said beveled gear is connected by acollar, 57, on its hub engaging a groove in the bracket 53, formed on orsecured to the crosshead or carriage, as shown in Fig. 9.

On the shaft 55, near its rear end, is keyed a gear-wheel, 58,intermeshing with a corresponding gear-wheel, 59, keyed to the shaft 60,which is mounted at its rear end in suitable bearings, 61, on the rearend piece of the main frame and at its forward end in a bearing, 62,formed on the lower end of a lever, 63, pivotally supported on a bar,64, secured to the engine-frames 6, as shown in Figs. 1, 5, and 7. Thisarrangement of the shaft permits of such lateral movement thereof bymeans of the lever 63 as to bring the frictionwheel 65 on the shaft 60into operative con'- tact with the sides of either one of the disks 6667 on the engine-shaft 13, thereby rotating the shaft in eitherdirection, as required for the movements of the cross-head or carriage.In order to provide for variations in speed of the cross-head orcarriage, the friction-wheel is so connected to the shaft 60 by a splineand groove (see Figs. 1 and 7) as to be capable of movement along saidshaft, whereby it may be brought into contact with the sides of thefriction-disks at different distances from their centers. Thislongitudinal adjustment of the friction-wheel is effected by a yoke, 68,engaging opposite sides of said wheel, the handle of said yoke extendingrearwardly through the lever 63, and being provided with a series ofteeth held in engagement with one side of the hole in the lever by aspring, 69.

1t frequently happens that the coal is so hard that the friction betweenthe wheel 60 and disk 66, which is employed for feeding IOO IVIO

the cross-head or carriage forward, is not sufficient to force and holdthe cutters to their work; hence a beveled gear-wheel, 70, is formed onthe front end of the friction-wheel (35, said beveled gear being adaptedto engage a corresponding gear-wheel, 7l, on the engine-u shaft. By theabove-described construction and arrangement of feed-operating mechanismthe speed of penetration of the cutters can be regulated according tothe character of the coal being eut, the feed being rendered certainwhen the coal is hard by the engagement of the beveled gears 7 O and 71and sufficiently slow by properly proportioning the relative diametersof said beveled gears.

The front ends of the drill-bars 27 are provided with cutter-holders 72,in which are secured the cutters 2S, as hereinbefore stated. Between theholder 72 and the front end of the main frame is arranged a spiralconveyer, 7f3, for removing the dust and dirt from the cut, saidconveyer being formed of a flat strip of spring metal wound around thedrill bar or spindle, the inner edges of the coils fitting the spindleor bar, but free to move along` the same. One end of the strip issecured in a slet cut in a projection or lug, 7 4, on the rear end ofthe holder 72, as shown in Figs. 12 and i-l, and the opposite end ofsaid strip is secured in a slot formed in a ring, 75, loosely mounted ona collared sleeve, 7 G, arranged on the spindle or bar 27, but held asagainst movement with the spindle or bar by a forked keeper, 77,engaging one of the collars on said sleeve and bolted to the front endof the main frame, as shown in Figs. 12 and 13.

lt will be readily understood from the above that when the spindles orbars 27 are at or near the rearward limit of their movement in the framethe coils of the conveyer will be closed together, Vas shown in Figs. 1,2, and 5; but as the cutters move forward in the euttin g operation thecoils will open, thereby increasing their pitch and rendering theconveyer more effective in removing the dust and dirt from the cut. Itwill also be understood that by the use of the extensible conveyer thegear-wheel for driving the cutter bar or spindle can be located muchnearer the cutter, and at the same time permitting el' the use of aconveyer operative along the entire depth of cut, except such portionsthereof as are occupied by the cutter.

lVhile operating, the machine is preferably supported by rails 7S,secured to beams 7 S), arranged transversely of the chamber, as shown inFig. 2, and the machine is held as against rearward and upward asregards its front end movement by undercut hooks SO, secured to theunder sides of the side pieces, 3, of the main frame, and adapted toengage the rail 78 under the front end of the machine, said rail beingheld from rearward and upward movement by the dogs 8l, engaging thefloor of the chamber and the rail, and an extensible brace, S2, bearingat its ends against the dog S1 and the roof of the chamber, as shown inFigs. 1 and 2.

In operating my improved machine the spindles or bars are retracted, asshown in Figs. 1 and 2, and the machine is arranged in proper relationto the breast of the chamber, and its forward end secured in position bymeans of the undercut hooks 80, engaging the rail. 79, which is held inproper position by the dog S1 and brace S2. Steam or other suitablefluid is then admitted into the cylinders 5, thereby rotating thecutters through the system of gearing hereinbefore described, connectingthe engine-shaft 12:3 with the drill bars or spindles 27. It will beobserved that elements forming parts of this system of gearing from thepower-distributing shaft 1G to the drill bars or spindles are soproportioned relatively to each other that there is a gradual andprogressive gain of power between the shaft 1G and the drill-bars. Inorder to move the drill bars or spindles forward, the lever 63 is soshifted as to bring the friction-wheel G5 into iirm contact with thedisk G6, thereby rotating the shaft GO, gear-wheels 59 and 5S, shaft 55,bevelgears 5i and 50, pinion eti), gear-wheel i8, and shaft i7 on thelcross-head or carriage. rlhe rotation of this shaft so operates thesystems of gearing' at each end of the cross-head or carriage as to movethe latter forward and with it the cutter bars or spindles 27.

It will be observed that elements of the systems' of gearing foroperating the crosshead or carriage are so proportioned relatively toeach other that the initial speed imparted by the disk GG isconsiderably reduced in transmission to the pinion 3S, engaging the rack37, and that the power is correspondin glyincreased. Vhen, by reason ofthe hardness of the coal being cut, the frictional enga-gement of thewheel G5 with the disk C6 is not sufficient to feed the cross-head orearriage forward, the wheel G5 is moved along the shaft G0 until thebevel-gear 70 on said wheel engages the corresponding gear, 71, on theengine-shaft 13, thereby rendering the feed positive, and also soreducing the speed of such feed as not to force the cutters forward morerapidly than they can eut their way into the coal.

I claim herein as my invention- 1. In a minnig-machine,ithe combinationof a series of revoluble cutter bars or spindles, a movable cross-heador carriage having the bars or spindles connected thereto, a system ofgearing at each end of said cross-head or carriage for moving the same,a central system of gearing engaging the systems of gearing at the endsof the carriage, and a frictional gearing vfor operating the centralsystem of gearing, substantially as set forth.

2. In a mining-machine, the combination of an angular cutter bar orspindle, a gearwheel. having an angular opening therethrough for thereception of the bar or spindle,

IOO

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and rollers interposed between the bar or spindle and the sides of theopening through the gear-wheel, substantially as set forth.

2%. In a mining-machine, the combination of a series of cutter bars orspindles, and a like series of gear-wheels for revolving such bars orspindles, said gear-wheels being arranged iu different vertical planesand overlapping one another, whereby a practically-continuous out may beformed with comparatively small cutters, substantially as set forth.

l. In a mining-machine, the combination of a revol'uble andlongitudinally-movable cutter bar or spindle and an extensible conveyerarranged in the rear of the cutter, substantially as set forth.

5. In a mining-machine, the combination of a revoluble andlongitudinally-movable cutter bar or spindle and a flat strip of metalwound spirally around said bar or spindle and secured only at its endsto the cuttenbar7 substantially as set forth.

G. In a mining-machine, the combination of a series of revoluble cutterbars or spindles, a cross-head or carriage for moving said bars'friction-disks and adapted through suitable gearing to shift thecross-head or carriage forward and backward, substantially as set forth.

7. In a mining-machine, the combination of a series of revoluble cutterbars or spin dles, a cross-head or carriage for moving said bars orspindles longitudinally, rotating friction-disks, and a friction-wheelmounted on a horizontally-movable shaft and longitudinally adjustabletherealong7 said shaft being arranged between thefriction-disks andadapted through suitable gearing to shift the crosshead or carriageforward or backward at different speeds in accordance with the positionof the friction-wheel as regards the axis of the friction-disks,substantially as set forth.

In testimony whereof I have hereunto set my hand.

EDVIN E. CARTER.

IN/Titliesses:

DARWIN S. WoLcoTT, W. B. CoRwrN.

